Author Question: A 0.10- gas tank holds 5.0 moles of nitrogen gas (N2), at a temperature of The atomic mass of ... (Read 156 times)

j.rubin · **on:** Jul 29, 2018

A 0.10- gas tank holds 5.0 moles of nitrogen gas (N2), at a temperature of The atomic mass of nitrogen is 14 g/mol, the molecular radius is 3.0 10-10 m, and the Boltzmann constant is 1.38 10-23 J/K.

The root-mean-square speed (thermal speed) of the molecules is closest to
A) 570 m/s.
B) 810 m/s.
C) 410 m/s.
D) 22 m/s.
E) 99 m/s.

Question 2

The root-mean-square speed (thermal speed) of a certain sample of carbon dioxide molecules, with a molecular weight of 44 g/mol, is 396 m/s.

What is the root-mean-square speed (thermal speed) of water vapor molecules, with a molecular weight of 18 g/mol, at the same temperature?
A) 253 m/s
B) 396 m/s
C) 421 m/s
D) 506 m/s
E) 619 m/s